﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ay.AyExpression
{
    public class AyFormIDCardValidator : AyFormValidator
    {
        public AyFormIDCardValidator()
        {
            Example = "650101198604183434";
            ErrorInfo = AyFormErrorTemplate.IDCard;
            CustomFunc = (text) =>
            {
               // var id1 = IsMatch(text, @"/^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$/");
               // if (id1) return true;
               //var dd=  IsMatch(text, @"/^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])((\d{4})|\d{3}[A-Z])$/");
                return CheckIDCard(text);
            };

        }

        private bool CheckIDCard(string Id)

        {

            if (Id.Length == 18)

            {

                bool check = CheckIDCard18(Id);

                return check;

            }

            else if (Id.Length == 15)

            {

                bool check = CheckIDCard15(Id);

                return check;

            }

            else

            {

                return false;

            }

        }

        private bool CheckIDCard18(string Id)

        {

            long n = 0;

            if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)

            {

                return false;//数字验证

            }

            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";

            if (address.IndexOf(Id.Remove(2)) == -1)

            {

                return false;//省份验证

            }

            string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");

            DateTime time = new DateTime();

            if (DateTime.TryParse(birth, out time) == false)

            {

                return false;//生日验证

            }

            string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');

            string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');

            char[] Ai = Id.Remove(17).ToCharArray();

            int sum = 0;

            for (int i = 0; i < 17; i++)

            {

                sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());

            }

            int y = -1;

            Math.DivRem(sum, 11, out y);

            if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())

            {

                return false;//校验码验证

            }

            return true;//符合GB11643-1999标准

        }

        private bool CheckIDCard15(string Id)

        {

            long n = 0;

            if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14))

            {

                return false;//数字验证

            }

            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";

            if (address.IndexOf(Id.Remove(2)) == -1)

            {

                return false;//省份验证

            }

            string birth = Id.Substring(6, 6).Insert(4, "-").Insert(2, "-");

            DateTime time = new DateTime();

            if (DateTime.TryParse(birth, out time) == false)

            {

                return false;//生日验证

            }

            return true;//符合15位身份证标准

        }
    }
}
